24 
GUIDE TO THE 
Eagle, A. imperialism resembling the Golden Eagle, 
but smaller ; the small Booted Eagle, A. (or Nisaetas) 
pennata. All these have the legs feathered to the 
toes, and are the real noble Eagles. Others, with the 
tarsus bare or partly so, are the large Sea-Eagle of 
Europe, Haliaetus alhicilla, and its American repre- 
sentative, the somewhat smaller White-headed Sea- 
Eagle, Hal. lemocephalusrn the American National Bird. 
The Sea-Eagles live chiefly on fish, and still more so 
the Osprey or Fish-Eagle, Pandion haliaetus, while 
the Short-toed Eagle, Circaetus gallicus (or hrachy- 
dactylus), lives principally on snakes, reptiles, and 
other creeping animals. The Circaeti, however, are 
not true Eagles. The Buzzards, Buteo — of which the 
Common Buzzard, Buteo buteo (or vulgaris), although 
no longer common, still breeds in Great Britain — 
occur in many species all over the world. The 
Eough-legged Buzzard, with feathered tarsi like a 
true Eagle, but weaker and of the habits of an 
ordinary Buzzard, is placed in the genus Archibuteo. 
The European species is A. lagopus. Of this two 
specimens are exhibited which were shot (or caught) 
near Tring (Halton), and others from other places. 
The “ Bateleur Eagle,” Helotarsus ecaudatus, from 
Tropical Africa, is known from the remarkable evolu- 
tions it displays in mid-air during the pairing time, 
and characterised by a very short tail. 
The genus Falco, the true Falcons, are well re- 
presented. There is the noble and beautiful white 
